This midcentury chapel is a bold architectural statement and a symbol of Indiana's Lutheran heritage.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

A mini Wrigley Field for mini baseball players.

A large collection of motorbikes with some impressive gems.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

This unassuming city park is home to three different types of Native American mounds.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

This quirky museum has a collection of more than 15,000 bobblehead dolls.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The 606 is a decade in the making.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A century-old network of freight tunnels underneath the city's historic business district.

A hidden grotto on the grounds of the Kane County Government Center.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

Internationally known record store and purveyor of "dusties."

A Chicago Movie Palace Lost to Time.

Cemetery featuring rare glass-fronted columbarium.

Burial mounds of prehistoric Native Americans who lived along the DuPage River.

This overgrown Illinois water park offers a whole new type of adventure.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.